Installing dhtmlxspreadsheet in Joomla 3.3

I have installed the dhtmlxspreadsheet plugin and activated it and entered the appropriate marker in a Article. [[spreadsheet?&width=600px&height=400px&id=3&color_scheme=salad]] When I save the article and preview my website, nothing is displayed it is blank. I have read some of the forums, but they are hard to follow. I use cpanel to for my file manager. Could you please be specific as to what I need to check and correct to make this work.